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<TITLE>JavaScript Source Code 3000:  Forms:  Validation (Character)</TITLE>
<META HTTP-EQUIV="JavaScript Source Code 3000" CONTENT = "no-cache">
<META NAME="description" CONTENT="Automatically removes specified characters from input box.  Good for fields that require only text/number inputs. Easily modified to accept only text or only numerals.">
<META NAME="date" CONTENT="2001-01-15">
<META NAME="channel" CONTENT="Web Developer">
<META NAME="author" CONTENT="Mikhail Esteves">
<META NAME="section" CONTENT="Forms">
<SCRIPT LANGUAGE="JavaScript">
<!-- Original:  Mikhail Esteves (miks80@yahoo.com) -->
<!-- Web Site:  http://www.freebox.com/jackol -->




<!-- Begin
var mikExp = /[$\\@\\\#%\^\&\*\(\)\[\]\+\_\{\}\`\~\=\|]/;
function dodacheck(val) {
var strPass = val.value;
var strLength = strPass.length;
var lchar = val.value.charAt((strLength) - 1);
if(lchar.search(mikExp) != -1) {
var tst = val.value.substring(0, (strLength) - 1);
val.value = tst;
   }
}
function doanothercheck(form) {
if(form.value.length < 1) {
alert("Please enter something.");
return false;
}
if(form.value.search(mikExp) == -1) {
alert("Correct Input");
return false;
}
else {
alert("Sorry, but the following characters\n\r\n\r@ $ % ^ & * # ( ) [ ] \\ { + } ` ~ =  | \n\r\n\rare not allowed!\n");
form.select();
form.focus();
return false;
}
alert("Correct Input");
return false;
}
//  End -->
</script>

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<A HREF="../index.htm" /" TARGET="_top"><FONT COLOR="#0000FF"><b>Home</b></font></A>
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<A HREF="index.htm" /forms/" ><font color="#FF0000"><b>Forms</b></font></A>
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<FONT COLOR="#006666"><b>Validation (Character)</b></font></font>
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<!-- Description --><!--content_start-->
Automatically removes specified characters from input box.  Good for fields that require only text/number inputs. Easily modified to accept only text or only numerals.
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<!-- Demonstration -->
(Try entering characters other than A-Z and 0 - 9.)
<form name=xyz onSubmit="return doanothercheck(this.txtTerm);">
<input type="text" name="txtTerm" size="35" maxlength="50" value="" onKeyUp="javascript:dodacheck(xyz.txtTerm);">
<br>
<input type=submit value=Check>
</form>
<P>
<P>
<a name="source">
<table BORDER=0 WIDTH=486 CELLPADDING=3 CELLSPACING=0>
<tr><td BGCOLOR=yellow><font FACE="helvetica,arial,geneva"><b>JavaScript Source Code 3000:  Forms:  Validation (Character)</b>
<p>Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Command-s).  The script is yours!!!
<br><br></font></td></tr>
<tr><td BGCOLOR=yellow ALIGN=CENTER>
<form NAME="copy">

<DIV align="center">
<input type=button value="Highlight All" onClick="javascript:this.form.txt.focus();this.form.txt.select();">&nbsp;&nbsp;&nbsp;&nbsp;
<INPUT TYPE="text" NAME="total" VALUE="Script Size:  1.72 KB" size=24>
</DIV>

<textarea NAME="txt" ROWS=20 COLS=75 WRAP=VIRTUAL>

&lt;!-- TWO STEPS TO INSTALL VALIDATION (CHARACTER):

  1.  Copy the coding into the HEAD of your HTML document
  2.  Add the last code into the BODY of your HTML document  --&gt;

&lt;!-- STEP ONE: Paste this code into the HEAD of your HTML document  --&gt;

&lt;HEAD&gt;

&lt;SCRIPT LANGUAGE="JavaScript"&gt;
&lt;!-- Original:  Mikhail Esteves (miks80@yahoo.com) --&gt;
&lt;!-- Web Site:  http://www.freebox.com/jackol --&gt;

&lt;! &gt;
&lt;! &gt;

&lt;!-- Begin
var mikExp = /[$\\@\\\#%\^\&\*\(\)\[\]\+\_\{\}\`\~\=\|]/;
function dodacheck(val) {
var strPass = val.value;
var strLength = strPass.length;
var lchar = val.value.charAt((strLength) - 1);
if(lchar.search(mikExp) != -1) {
var tst = val.value.substring(0, (strLength) - 1);
val.value = tst;
   }
}
function doanothercheck(form) {
if(form.value.length &lt; 1) {
alert("Please enter something.");
return false;
}
if(form.value.search(mikExp) == -1) {
alert("Correct Input");
return false;
}
else {
alert("Sorry, but the following characters\n\r\n\r@ $ % ^ & * # ( ) [ ] \\ { + } ` ~ =  | \n\r\n\rare not allowed!\n");
form.select();
form.focus();
return false;
}
alert("Correct Input");
return false;
}
//  End --&gt;
&lt;/script&gt;

&lt;/HEAD&gt;

&lt;!-- STEP TWO: Copy this code into the BODY of your HTML document  --&gt;

&lt;BODY&gt;

&lt;form name=xyz onSubmit="return doanothercheck(this.txtTerm);"&gt;
&lt;input type="text" name="txtTerm" size="35" maxlength="50" value="" onKeyUp="javascript:dodacheck(xyz.txtTerm);"&gt;
&lt;br&gt;
&lt;input type=submit value=Check&gt;
&lt;/form&gt;

 

&lt;!-- Script Size:  1.72 KB --&gt;</textarea><br><font FACE="helvetica,arial,geneva"></font></td></tr>

</table>
</form>
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